Attachment to the grain-cleaning device of a grain-harvesting machine



June 30,192.5.

A. G. H. SPOEHR ET AL ATTACHMENT TO THE GRAIN CLEANING DEVICE OF A GRAIN HARVESTING MACHINE Filed March '7, 1925 lllllllllllllllllll lllllllllllllllllll ""muuluu" uuuuumnnew v@HMMUIHlHIHlHHHHUHHH Patented .lune 30, 1925.

PAT slvfyjomcgp.-.

ARTHUR GUsTavHENRYsPoEHR AND AUGUST CARL EDARDT sPoEHR,.oF Miv'rnno,

- 1^ SOUTH AUSTRALILAUSTRALIL, Y y A ATTACHMNT ToTHEcRAnv-CLEAMNG DEVICE oF GRAIN-Hanvns'rins naeHINE.

'I Abpii'auon. ined March 7, i925. `sei-ariNo. A13,8221

To all whom it may concern;

Be it known that we, ARTHURA GUs'rAv HENRY SroEHRj and AUGUST 'Gann vEnAnD'r Sroriiin, vsubjects ofthe King `oflGrreat 6 Britain .and Ireland, Vandresidents of Minh .t'aroj Stateiofl South Australia, Commonwealtlrof Australia, have invented i a certain new and useful Attachment to the' Grain- Cleaning' Device of a' Grain-'Harvesting Ma- 10 chine, ofwhiclrthe following is a specifi ,catena r L i f, i

vfW-ith thegrain'cleaning devices' of grain harvesting machines as at 'present arranged iti'A frequently happens 'that in a crop infested with s'tar 4thisties and 'other A thistles aiid'aveedsl ,the ,hads'nof such accumulate upvonthe upper sieve'and flow over the backl of same-on to` the' lower' `sieve and elsewherev and so produce a-very' dirty sample of grain and frequently a great dealvof the grainis lost.. t l

According toour invention we provide an attachment to or an extension of the upper sieve which. closes the space Abetween the back `or receiving end of the upperVA sieve and. the bottom ofA the vfeed hopper and' prevents" suchf o'veriow 'and ensures a clean sample of grain, such 'attachment' comprising a curved perforated sheet of material, preferably metal, hereinafter designated the thistle screen, which extends across the full width of the sieve,` its lower' edge being fastened upon the uppersieve at or near the rear edge of same (or being an extension of the same), and its upper edge fitting beneath the rear edge of the rake over which the crop passes from the hopper to the sieve, the thistle screen extending upwardly and rearwardly ,from its lower edge to its upper edge, and the perforations in same being of such size and number as will prevent the passage of any thistle heads or weeds but will permit the flow of sufficient blast over the top of the upper sieve to keep it clean.

In order that our invention may be the more clearly understood we will describe the same with reference to the accompanying drawings in which Fig. 1 shows side and end views respectively of our thistle screen complete,

Figs. 2, 3 and at illustrate modifications in the method of attachment of the screen designed to suit various makes of machines,

Fig. 5 illustrates on a larger scale portion -of the"perforated .sheetof material-form-- of perforation, l.,

Fig1."6 la; sectional 4view showing the position of'the screen inthe machine in relation to, the sievesfand Fig. 7I is a sectional View showing our screen made ,integral with or as an exten#1 sion of the sieve. 'A i, "In the 'drawingsQS represents 'a' curved ing the screen showingtlie preferred forni perforated sheet ofimetal-',"forming our` thistlejscreen which extends across 'the full width of the 'sieve'9, 'its lower edg'e being fastened tothe sie'veator near-the rear? end of sameyandfwhich extends upwardly and rearwardly therefrom so that its upper edge fits beneath the bottom of the hopper 10,'that is just beneath the rear edge of the rake '11 over whichjthe'crop passes from the hopper to the sieve 9.' v'The perforations 12 vin the sheet of 'materialfextend:from just above its lowereid'ge and are 'of ysuch size and vnumber as to' prevent the passag'e of any thistle heads or weeds but will permit the io'w }of"suliicientblast overthe top of vthe upper' sieve to keep it clean. i The lowered'ge Iof the'sheet'of perforated materialyis 'provided with an'angle iron -reinforceme-nt'13, and preferably a'light'reinforcement is provided along the upper edgeand lsides. In the drawing Fig. 6 we have shownour screen attached ,to a long sieve. In this case the lower'edge is fastened to the sieve by means of several bolts 14 which pass downward through the sieve and through a suitably shaped bar 15 on the underside of the sieve. The ends of the screen are shaped to fit to the frame of the sieve. Vhen our screen is attached to a short sieve it is secured in place by bolts passing through horizontal holes in the screen and through corresponding holes in the rea r frame bar of the sieve.

In the modification illustrated in Fig. 2 the angle iron reinforcement 13 does not extend the full width of the screen but has a laterally projecting angle iron bracket 16 fastened to each end with a bolt to pass through the frame of the sieve and thus hold the screen in position.

In the modification illustrated in Fig. 3 the angle iron reinforcement 13 extends the full width of the screen and has at each end an angle iron bracket 17 facing toward the discharge end of the sieve carrying downwardly projecting bolts which pass A through perforations m the 4'frame of vlthe alongjthe: centre7 as illustrated in Fig. 4,.

the upper vportion S being secured to an angle ironv bar '18 which extends across the riddle box and is held at each end by two plates lfastened :by'screws to the sides o'l' the riddle box, therhinged lower portion 8" being movableabout vtheliinge 19 so that it .may be lifted up when it jis desired to change the sieves and lowered to the surfaceo the .sieve when lthe machine'is .working. 'IliisportionB" is-held in contact with thefsieye byvimeans'o'f screwsQO projecting from @the .lowerl ends of` theV bars 1 8 -and passingfthrough. the edgesof the screen with wing nuts von the outside. Strengthening pieces may be provided along'fthe edgesl of theiscreen.

As a furthenmodiication of theconstructions illustrated our thistle screen may be formedintegrzilwith the main body vofthe sieve` thatlisas a continuation of the same,l the fperforated metal being. fixed in al Yframe of suitablybent wood, iron or other material.

The foperation'oi ouil invention is as Jfollows: The crop to be cleaned `tiowsfrom the .hopper -and down the rake ll. As it falls from vthe rake the blast :passing tlnoughgon'r,thistle screen 9 .lifts the light thistleiheads 'and weeds and allows thegrain to 'fall throughthem on to the sieve. Qur screen "Sprevents the accumulation of thistle headsand weedsiupon the sieve and their passage over the: rear or Vreceiving end of* safme.- -It ensl'lres -that' "thefblast shall'have free play 'upon the crop Vfalling from the rake with the result that the grain Filters through the 'thistle #heads and "weeds aand :'lows down the-:sieve while the blast blow the thistles and weeds out over the discharge -end of the-riddle Joon. vllt efeotuaily preventsgthe thistle heads and Weeds 'from \vorking''back' over the rear end of for-ated material' provided at its lower-edge with means whereby it may be held in "enl gageinent Awitlifth'e receiving en'd o fjfthe sieve with 'its Aconvex si'de .'faei'ng. -the direction of travel of the grain.

2. A atta"lii'ne'ntfiorl afsievefoifffa grain' separator, compri'sing'a curved "s'heetof terial formed of hingedfsetions thel' ith-the receiving end ''f'the sieie. A

3( An attachment 'for a sieve 'ola `grain separator, 'Comprising a' 'sheet' of perforated` material, angleirons at the sidesof the sheet and to which ythe rear `section theredf vis seein-ed, and adjusting -s'creWs--carried'by the a. irons and I})'assing Vthrough .tlieffor-l ward section ot'said sheet for holding :it/ini engagement V'\\' i t h the receiving :end of' 'the Sieve Y In testimony,that we claim 'the'foregoing asour invention we khave signed our names in the presence o'ivtwo si'ibseribing witnesses this ninth Aday offJanuary, 1925,. y

' VlAR'TmgR 'Cosmi/HENRY sperma. AUGUST ima mmm-stoma, "Witnesses ,j iA

BRIANQJ'AMS TILBigooK, R'noiNALn lEDiif\ Rn` MASTERS. 

